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Old 10th April 2010, 03:08 AM   #1
maartentje is offline maartentje  United States
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Default Fostex Dallas II

Hi guys,

I am starting with the building of the Dallas II. Any tips about the damping material in the cabinet? Cant find anything about it.

Thnx!
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Old 10th April 2010, 04:53 AM   #2
planet10 is offline planet10  Canada
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Fostex Dallas II
Should be no damping required in the horn. You'll want to play with it in the air cavity.

dave
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Old 10th April 2010, 02:39 PM   #3
maartentje is offline maartentje  United States
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Hi,

Thnx the air cavity is the area behind the driver right? What kind of material you sugest?

thnx
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Old 24th April 2010, 03:17 PM   #4
maartentje is offline maartentje  United States
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Is this the way it should be ? Any tips?
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Old 25th April 2010, 12:55 PM   #5
DaveCan is offline DaveCan  Canada
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Looks like a good start to me for damping And good job on the build too!!, however it's too bad it had to be made from mdf If you like what you hear when your ready to fire them up (and I'm sure you will), it would be a great improvement to make another set out of Baltic Birch ply or equivalent, instead of mdf ... Dave

Last edited by DaveCan; 25th April 2010 at 12:59 PM.
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Old 25th April 2010, 01:18 PM   #6
mightym is offline mightym  United States
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In a post on the old Fullrange forum, the designer stated IIRC.

Put some felt in the bends, and add 1-4 Ohm series resistance to taste.

This is paraphrased, of course, but he did recomend damping the outside of the 2 bends, and adding a small amount of resistance to taste. I believe he also said something about the chamber behind the driver too.

If I can ever get off my A$$, I've got a pair of Dallas II's to finish too.

John

The forum is searchable, and that's how I found the above. I do not remember the search terms I used, sorry. I found the above when researching my build.

Good looking build BTW.
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Old 25th October 2016, 06:57 AM   #7
WayneAudio is offline WayneAudio  United Kingdom
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Quote:
Originally Posted by maartentje View Post
Is this the way it should be ? Any tips?
What material have you used in the closed triangular cavities, Martin?

Cheers,

Wayne
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Old 27th October 2016, 11:40 AM   #8
jimbro is offline jimbro  United States
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I'd use play sand.

Cheers,

Not Martin :-)
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Old 27th October 2016, 06:48 PM   #9
chrisb is offline chrisb
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I've used clay based kitty litter and glass "sand" blasting media on different builds, and even went to the extreme of wax filled shot (as in shot-gun). The latter was a holy mess - only tried that once - and I doubt worth the effort.
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Old 19th January 2017, 12:57 PM   #10
WayneAudio is offline WayneAudio  United Kingdom
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Originally Posted by jimbro View Post
I'd use play sand.

Cheers,

Not Martin :-)
Thanks mate!
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